The Cancer Crusaders have a couple WalMart ones coming up between the end of April and mid-May... I'll see if I can get you a ballpark. It will vary with location....some spots are hopping :) , others are pretty dead :(
Yes, we (Cancer Crusaders) did do one BBQ last year at Walmart in St. Albert. We were there two days and raised $800. The huge bonus about a Walmart one is that they match what you raise so we actually were able to get $1600 in the end. You have to leave your funds raised with Walmart that day so they can send it to Head Office and it does take about 3 weeks or more to get your cheque so be sure you aren't waiting until too close to the ride to host one.
We are doing two this year:
One at Walmart South Common on April 30th and May 1st from 9:30 to about 4 One at Walmart St. Albert on May 14th and 15th same times.